JPS60200A - Ultrasonic wave ceramic microphone - Google Patents
Ultrasonic wave ceramic microphoneInfo
- Publication number
- JPS60200A JPS60200A JP59102183A JP10218384A JPS60200A JP S60200 A JPS60200 A JP S60200A JP 59102183 A JP59102183 A JP 59102183A JP 10218384 A JP10218384 A JP 10218384A JP S60200 A JPS60200 A JP S60200A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- vibrating
- case
- metal
- microphone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は自動車用後方検知器などの屋外用の超音波セン
サーとして用いる超音波セラミックマイクロホンに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic ceramic microphone used as an outdoor ultrasonic sensor such as an automobile rear detector.
従来のこの種のマイクロホンについて第１図とともに説
明する。１は振動ケースで、側部１ａの厚みに比べ振動
部１ｂの厚みを薄く構成して機械的インピーダンスの差
位を設け、振動効率を改善した構造を有する。２は圧電
磁器振動子であり、この圧電磁器振動子２を振動ケース
１の振動部１ｂに貼り合せ、振動ケース１の下部の開孔
部に端子板３を弾性接着剤４を介して固定している。A conventional microphone of this type will be explained with reference to FIG. Reference numeral 1 denotes a vibrating case, which has a structure in which a vibrating part 1b is thinner than a side part 1a to provide a difference in mechanical impedance and improving vibration efficiency. 2 is a piezoelectric ceramic vibrator, and this piezoelectric ceramic vibrator 2 is bonded to the vibrating part 1b of the vibrating case 1, and a terminal plate 3 is fixed to the opening in the lower part of the vibrating case 1 via an elastic adhesive 4. ing.
上記従来の超音波セラミックマイクロホンにおいて、振
動ケース１は側部１ａと振動部１ｂを直角に構成し、こ
の側部１ａと振動部１ｂの厚み差を大きくとることによ
り、振動効率を上げようとしていた。しかし、このよう
な構成のみでは側部１ａは振動部１ｂとともに振動する
ため、振動部１ｂの振動のエネルギーは吸収され、前面
の振動部１ｂから放射される音波の音圧は低下し、さら
に振動ケース１の側部１ａを支持することにより、イン
ピーダンス特性が影響し、特性が変動しゃすいものであ
った。また、振動ケース１は側部１ａと振動部１ｂの厚
み差を利用しているため、均一材料でのしぼシ加工がで
きず、加工性が悪いものであった。In the conventional ultrasonic ceramic microphone described above, the vibration case 1 has a side portion 1a and a vibrating portion 1b arranged at right angles, and an attempt is made to increase vibration efficiency by increasing the difference in thickness between the side portion 1a and the vibrating portion 1b. . However, with only such a configuration, the side portion 1a vibrates together with the vibrating portion 1b, so the energy of the vibration of the vibrating portion 1b is absorbed, the sound pressure of the sound wave radiated from the front vibrating portion 1b decreases, and further vibrations occur. By supporting the side portion 1a of the case 1, the impedance characteristics are affected and the characteristics tend to fluctuate. Furthermore, since the vibrating case 1 utilizes the difference in thickness between the side portion 1a and the vibrating portion 1b, it is not possible to wrinkle a uniform material, resulting in poor workability.
本発明は以上の従来の欠点を改良するものであり、高感
度、広帯域の超音波セラミックマイクロオンを提供する
ものである。The present invention improves the above-mentioned conventional drawbacks and provides a highly sensitive, broadband ultrasonic ceramic micro-on.
本発明の一実施例について、第２図をもとにして説明す
る。５は金属製共振板で、均一な平面を有する振動部６
ａの外縁部に、振動抑制部５ｂを前記振動部５ａと一体
に設けた構成である。振動抑制部６ｂの断面は傾斜した
波状の形状を有し、その波状は２個以上の腹部を有して
いる。！、た、金属製共振板６はその振動部５ａの下面
に圧電磁器振動子６が貼り合せられ、複合共振子を構成
する。７は筒状のケースであり、金属製共振板６におけ
る振動抑制部５ｂの外縁部をケース７の上部の開孔部に
固定し、一定ケース７の下部の開孔より、中央部に反射
部８ａを有する端子板８を挿入し、ケース７の下部の開
孔を端子板７の底面で閉塞する。さらに、この端子板８
とケース８の隙間を弾性樹脂９によって密閉している。An embodiment of the present invention will be described with reference to FIG. 5 is a metal resonance plate, and a vibrating part 6 has a uniform plane.
A vibration suppressing section 5b is provided integrally with the vibrating section 5a at the outer edge of the section a. The cross section of the vibration suppressing portion 6b has an inclined wavy shape, and the wavy shape has two or more abdomens. ! In addition, a piezoelectric ceramic vibrator 6 is bonded to the lower surface of the vibrating portion 5a of the metal resonator plate 6, thereby forming a composite resonator. Reference numeral 7 denotes a cylindrical case, in which the outer edge of the vibration suppressing part 5b of the metal resonance plate 6 is fixed to the opening in the upper part of the case 7, and a reflecting part is inserted into the center part through the opening in the lower part of the case 7. The terminal plate 8 having the terminal plate 8a is inserted, and the opening in the lower part of the case 7 is closed with the bottom surface of the terminal plate 7. Furthermore, this terminal board 8
The gap between the case 8 and the case 8 is sealed with an elastic resin 9.
なお、前記金属製共振板５とケース７を一体に構成する
ことも可能で、一体に構成しても本発明の目標とする性
能が得られる。ここで、本発明の一実施例の寸法を次表
に示す。Note that it is also possible to configure the metal resonance plate 5 and the case 7 in one piece, and even if they are configured in one piece, the performance targeted by the present invention can be obtained. Here, the dimensions of one embodiment of the present invention are shown in the following table.
表
ここで外径Ｄ１．Ｄ２、厚み１１．１２、角度θおよび
間隔人は第２図に示している。In the table, the outer diameter D1. D2, thickness 11.12, angle θ and spacing are shown in FIG.
なお、端子板８０反射部８ａと圧電磁器振動子らとの間
隔人は定在波共振を得やすい位置に構成することがのぞ
ましい。計算ではλ／４（λは振動波の波長）以上の位
置で定圧波共振を得られるが、実際には、複合形の共振
形状のため、実測により設定している。Incidentally, it is preferable that the distance between the terminal plate 80 reflection section 8a and the piezoelectric ceramic vibrator etc. be configured at a position where standing wave resonance can be easily obtained. According to the calculation, constant pressure wave resonance can be obtained at a position of λ/4 (λ is the wavelength of the vibration wave) or more, but in reality, it is set by actual measurement because the resonance shape is a composite type.
以上の構成によれば、金属製共振板６により振動のエネ
ルギーがケース７に吸収されることを防止できる。これ
は、金属製共振板５は、波状の振動抑制部６ｂにおいて
ケース７の上端部に固定されているため、振動部６ａの
振動抑圧および振動部５ａからの振動漏れが緩和され、
安定した振動を得ることができるためである。また、金
属製共振板５−中夫の平面部よりなる振動部６ａと、こ
の振動部５ａの外縁部を波状の傾斜させた曲部に変形し
てなる振動抑制部５ｂとよりなっており、上記振動部６
＆を凹部の底面とした外底がりの形状をしているため、
集音効果を有し、音響変換効率を著しく向上させること
ができる。また、圧電磁器振動板６と、端子板８に設け
た反射部８ａとの距離を適切に定め振動部６ａの音響共
振を得やすいようにしているため、高感度で、広帯域を
有する、密閉構造の超音波セラミックマイクロホンを実
現できる。According to the above configuration, vibration energy can be prevented from being absorbed by the case 7 by the metal resonance plate 6. This is because the metal resonance plate 5 is fixed to the upper end of the case 7 at the wavy vibration suppressing portion 6b, so vibration suppression of the vibrating portion 6a and vibration leakage from the vibrating portion 5a are alleviated.
This is because stable vibration can be obtained. Furthermore, it is made up of a vibrating part 6a made of a flat part of the metal resonance plate 5--a centerpiece, and a vibration suppressing part 5b made by deforming the outer edge of this vibrating part 5a into a wavy inclined curved part. The vibrating section 6
Because it has an outer bottom shape with & as the bottom of the recess,
It has a sound collecting effect and can significantly improve sound conversion efficiency. In addition, since the distance between the piezoelectric ceramic diaphragm 6 and the reflecting section 8a provided on the terminal plate 8 is appropriately determined to facilitate acoustic resonance of the oscillating section 6a, the sealed structure has high sensitivity and a wide band. Ultrasonic ceramic microphone can be realized.
、以上のように、本発明の超音波セラミックマイクロホ
ンは、金属製共振板の外縁部に傾いた波状の振動抑制部
を設け、この振動抑制部を介して金属製共振板を円筒状
ケースに固定しているため、振動効率が向上し、集音効
果もすぐれたものとなり、さらに端子板に金属製共振板
との共振を得やすくする反射部を設けているため高感度
で、広帯域の特性を有するものとなる。このような、超
音波セラミックマイクロホンは自動車後方検知器などに
用いる超音波センサーとして有用なものであり、産業上
の利用価値が太きい。As described above, in the ultrasonic ceramic microphone of the present invention, an inclined wavy vibration suppressing part is provided on the outer edge of a metal resonant plate, and the metal resonating plate is fixed to a cylindrical case via this vibration suppressing part. This improves vibration efficiency and provides excellent sound collection.Furthermore, the terminal board has a reflective part that facilitates resonance with the metal resonant plate, providing high sensitivity and broadband characteristics. Become what you have. Such an ultrasonic ceramic microphone is useful as an ultrasonic sensor used in automobile rear detectors, etc., and has great industrial utility value.
第１図は従来の超音波セラミックマイクロホンの正面断
面図、第２図は本発明の一実施例におけ″る超音波セラ
ミックマイクロホンの正面断面図である。
５・・・・・・金属製共振板、６ａ・・・・・振動部、
５ｂ・・・・・・振動抑制部、６・・・・・・圧電磁器
振動子、７・・川・（筒状の）ケース、８・・・・・・
端子板、８ａ・・・・反射部、９・・・・・・弾性樹脂
。FIG. 1 is a front sectional view of a conventional ultrasonic ceramic microphone, and FIG. 2 is a front sectional view of an ultrasonic ceramic microphone according to an embodiment of the present invention. 5...Metal resonance Plate, 6a... Vibrating part,
5b... Vibration suppressor, 6... Piezoelectric ceramic vibrator, 7... River (cylindrical) case, 8...
Terminal plate, 8a...Reflection part, 9...Elastic resin.
Claims (1)
に金属製共振板を固定し、この金属製共振板の中央に形
成された平面部よりなる振動部に圧電磁器振動子を貼り
合わせ、前記圧電磁器振動子と所定の間隔を保つ反射部
を設けた端子板により前記筒状ケースの他方の開孔部を
閉塞し、前記筒状ケースと端子間の隙間を弾性樹脂で密
閉してなる超音波セラミックマイクロホンであって、前
記金属製共振板の振動部の外縁部に傾斜した波状の振動
抑制部を形成し、上記金属製共振板を外底がりになるよ
うに変形してなる超音波セラミックマイクロホン。A metal resonant plate is fixed to one of the openings of the cylindrical case so as to close the opening, and a piezoelectric ceramic vibrator is attached to the vibrating part consisting of a flat part formed in the center of the metal resonator plate. The other opening of the cylindrical case is closed by a terminal plate provided with a reflective part that maintains a predetermined distance from the piezoelectric ceramic vibrator, and the gap between the cylindrical case and the terminal is sealed with an elastic resin. The ultrasonic ceramic microphone is formed by forming an inclined wavy vibration suppressing part on the outer edge of the vibrating part of the metal resonant plate, and deforming the metal resonator plate so as to have an outer bottom. An ultrasonic ceramic microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10218384A JPS6025959B2 (en) | 1984-05-21 | 1984-05-21 | ultrasonic ceramic microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10218384A JPS6025959B2 (en) | 1984-05-21 | 1984-05-21 | ultrasonic ceramic microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60200A true JPS60200A (en) | 1985-01-05 |
| JPS6025959B2 JPS6025959B2 (en) | 1985-06-21 |
Family
ID=14320554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10218384A Expired JPS6025959B2 (en) | 1984-05-21 | 1984-05-21 | ultrasonic ceramic microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025959B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001029820A1 (en) * | 1999-10-22 | 2001-04-26 | Thomson Marconi Sonar S.A.S. | Underwater broadband acoustic transducer |
-
1984
- 1984-05-21 JP JP10218384A patent/JPS6025959B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001029820A1 (en) * | 1999-10-22 | 2001-04-26 | Thomson Marconi Sonar S.A.S. | Underwater broadband acoustic transducer |
| FR2800229A1 (en) * | 1999-10-22 | 2001-04-27 | Thomson Marconi Sonar Sas | Surface boat underwater acoustic signal transmitter having flexing piezoelectric strip underside cap section inside air cavity and outer cap face water exposed |
| US6617765B1 (en) | 1999-10-22 | 2003-09-09 | Thales Underwater Systems S.A.S. | Underwater broadband acoustic transducer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6025959B2 (en) | 1985-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4226299A (en) | Acoustical panel | |
| CN209314103U (en) | Vibration sensors and audio equipment | |
| KR100296052B1 (en) | Ultrasonic Transceiver | |
| US3970879A (en) | Piezoelectric acoustic device | |
| US4228379A (en) | Diaphragm type piezoelectric electroacoustic transducer | |
| JP2001119795A (en) | Piezoelectric electroacoustic transducer | |
| JP3180646B2 (en) | Speaker | |
| WO2018186280A1 (en) | Piezoelectric acoustic component | |
| US4796725A (en) | Electrostatic transducer | |
| JPS60200A (en) | Ultrasonic wave ceramic microphone | |
| EP1061771A2 (en) | Speaker | |
| US3253674A (en) | Ceramic microphone | |
| JPS5830383Y2 (en) | ultrasonic ceramic microphone | |
| US3704385A (en) | Piezoelectric transducer assembly with phase shifting accoustical parts | |
| JP3528041B2 (en) | Speaker | |
| JPH0323757Y2 (en) | ||
| JPH0424718Y2 (en) | ||
| JPS5843357Y2 (en) | Ultrasonic transducer | |
| JPS5848865Y2 (en) | electroacoustic transducer | |
| JPS59218098A (en) | Ultrasonic wave ceramic microphone | |
| JPH0427280Y2 (en) | ||
| JPS5910875Y2 (en) | ultrasonic ceramic microphone | |
| JPH0241999Y2 (en) | ||
| JPS59210798A (en) | Ultrasonic ceramic microphone | |
| JPS6025198Y2 (en) | ultrasonic ceramic microphone |